Jami` at-Tirmidhi Book 48, Hadith 158
"O Allah! Verily, I ask You for the bounty's completion (Allāhumma, innī as'aluka tamāman-ni`mah)." So he (ﷺ) said: "What thing is the bounty's completion?" He said: "A supplication that I made, that I hope for good by it." He (ﷺ) said: "Indeed, part of the bounty's completion is the entrance into Paradise, and salvation from the Fire." And he (ﷺ) heard a man while he was saying: "O Possessor of Majesty and Honor (Yā Dhal-Jalāli wal-Ikrām)" So he (ﷺ) said: "You have been responded to, so ask." And the Prophet (ﷺ) heard a man while he was saying: "O Allah, indeed, I ask You for patience (Allāhumma, innī as'alukaṣ-ṣabr)" He (ﷺ) said: "You have asked Allah for trial, so ask him for Al-`Āfiyah."
“I heard the Messenger of Allah (ﷺ) saying: “Whoever goes to his bed while in a state of purity and remembering Allah, until slumber overtakes him, he shall not get up at any hour of the night and ask Allah for something from the good of the world and the Hereafter except that Allah shall grant it to him.’”
“When one of you becomes frightened during sleep, then let him say: ‘I seek refuge in Allah’s Perfect Words from His anger, His punishment, and the evil of His creatures, from the whisperings of the Shayatin, and that they should come (A`ūdhu bikalimātillāhit-tāmmati min ghaḍabihī wa `iqābihī wa sharri `ibādih, wa min hamazātish-shayāṭīni wa an yaḥḍurūn).’ For verily, they shall not harm him.” He said: “So `Abdullah bin `Amr used to teach it to those of his children who attained maturity, and those of them who did not, he would write it on a sheet and then hang it around his neck.”